Introducing minimum Fisher regularisation tomography to AXUV and soft x-ray diagnostic systems of the COMPASS tokamak

0383244 - ÚFP 2013 RIV US eng J - Journal Article
Mlynář, Jan - Imríšek, M. - Weinzettl, Vladimír - Odstrčil, Michal - Havlíček, Josef - Janky, Filip - Alper, B. - Murari, A. … Total 1023 authors
Introducing minimum Fisher regularisation tomography to AXUV and soft x-ray diagnostic systems of the COMPASS tokamak.
Review of Scientific Instruments. Roč. 83, č. 10 (2012), 10E531-10E531. ISSN 0034-6748. E-ISSN 1089-7623.
[Topical Conference High-Temperature Plasma Diagnostics/19./. Monterey, 06.05.2012-10.05.2012]
R&D Projects: GA ČR GA202/09/1467; GA ČR GAP205/10/2055; GA MŠMT(CZ) LG11018
Institutional research plan: CEZ:AV0Z20430508
Keywords : Tokamak tomography AXUV X-ray diagnostics
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.602, year: 2012
http://rsi.aip.org/resource/1/rsinak/v83/i10/p10E531_s1?ver=pdfcov

The contribution focuses on plasma tomography via the minimum Fisher regularisation (MFR) algorithm applied on data from the recently commissioned tomographic diagnostics on the COMPASS tokamak. The MFR expertise is based on previous applications at Joint European Torus (JET), as exemplified in a new case study of the plasma position analyses based on JET soft x-ray (SXR) tomographic reconstruction. Subsequent application of the MFR algorithm on COMPASS data from cameras with absolute extreme ultraviolet (AXUV) photodiodes disclosed a peaked radiating region near the limiter. Moreover, its time evolution indicates transient plasma edge cooling following a radial plasma shift. In the SXR data, MFR demonstrated that a high resolution plasma positioning independent of the magnetic diagnostics would be possible provided that a proper calibration of the cameras on an x-ray source is undertaken.
Permanent Link: http://hdl.handle.net/11104/0213245